Granite Straight Edge

The Fundamental Standard for True Alignment

A Granite Straight Edge is an essential precision tool designed to provide an accurate,stable reference line for checking flatness,straightness,and alignment.It is a cornerstone of quality control in machining,manufacturing,and inspection.

Why Granite?

Thermal Stability:Granite has an extremely low coefficient of thermal expansion.It remains dimensionally stable across temperature changes,ensuring consistent accuracy.

Vibration Damping:Its natural composition absorbs vibrations,making it ideal for precise measurements in active workshop or lab environments.

Durability:Harder than most metals,it resists wear,corrosion,and dents,maintaining its precision over decades.

Neutrality:Non-magnetic and non-conductive,it is safe for all materials and won’t interfere with sensitive components.

Precision at Its Core

Each Granite Straight Edge is precision-lapped to exacting flatness and straightness tolerances.The working edge is finished to a fine,consistent surface,making it ideal for both contact measurements and the visual“light-gap”inspection method.

Built to Perform

Engineered with robust cross-sections—such as rectangular or I-beam designs—for rigidity,it resists deflection under its own weight.Available in a range of lengths,it is a versatile tool for a variety of applications.

Where It’s Used

Machine Tool Calibration:To verify the straightness of lathe beds,milling machine ways,and surface grinder rails.

Surface Plate Verification:As the master tool for certifying the flatness of granite and cast iron surface plates.

Quality Inspection:For checking the flatness of machined parts,fixtures,and assemblies using the light-gap method.

Precision Layout:As a true reference for scribing and aligning components in toolmaking and assembly.